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22 July, 01:20

Alice takes her favorite number, adds 5 to it, multiplies the answer by 10, subtracts 20 from the result, and then drops the final 0. if alice's (correct) answer is 9, what is her favorite number?

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  1. 22 July, 03:54
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    (x + 5) 10 - 20 = 10x + 50 - 20 = 10 x + 30 = 10 (x+3)

    we drop the zero

    x + 3 = 9

    x = 9 - 3 = 6
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